(from the article `computer memory`) Magnetic disks are coated with a magnetic material such as iron oxide. There are two types: hard disks made of rigid aluminum or glass, and removable ... IBM introduced the first magnetic disk, the RAMAC, in 1955; it held 5 megabytes and rented for $3,200 per month. Magnetic disks are platters coated...
recording magnetic medium in the form of a disk
A magnetic disk is a flat circular disk coated with a magnetic material, used to store information in a computer system. The information is stored as a pattern of magnetised spots on the surface of the disk. The spots are arranged around the centre of the disk in concentric circles (tracks), which are divided into sectors. The disk is rotated in a ...
[n] - (computer science) a memory device consisting of a flat disk covered with a magnetic coating on which information is stored
magnetic disc noun (computer science) a memory device consisting of a flat disk covered with a magnetic coating on which information is stored